I loved listening to Harmony of Heroes! The Kirby song is great, too. I'm not too familiar with Rhythm Heaven music, but that's a cute mix.

I recently wrote a short remixed medley of Splatoon music combined with original content for the opening theme of a popular Splatoon series on YouTube. This song contains original Japanese lyrics sung by various VOCALOID characters!

Thank you! I try to do something game-music-related frequently! For instance, I just completed an advanced music course for Super Mario Maker yesterday. Check out my YouTube channel to see what other things I do.

Oh man, you reminded me of a Castlevania remix. =O I normally check up some tracks from the Dwelling of Duels website, where they upload some nice covers.
Here is one, Swinglevania from Prince of Darkness: https://www.youtube.com/watch?v=T3__a3-41U0

I'm going to post in this thread now so I don't forget about it later. Gonna contribute with the first thing that popped into my head, a drum cover of Bramble Blast/stickerbrush symphony (brawl version) that is pretty neat. https://www.youtube.com/watch?v=RcY4yxCsE6A